The ACM allows for General and Special Rates to be calculated so that for particular areas, the rate is based on the costs of projects located in that rate area. Currently there are rates for:
The rules require that rates be set using the ACM at least annually. Quarterly adjustments are made if income and expenses for the program show significant discrepancies. In new rate areas the highest Program rate is used until two nutrient reduction projects are available for use in determining the rate for that area.